{"id":13471,"date":"2023-11-03T19:40:45","date_gmt":"2023-11-03T19:40:45","guid":{"rendered":"https:\/\/www.africa-press.net\/comores\/politique\/la-miraculee-de-lile-maurice-retour-sur-le-difficile-sauvetage-dune-plante-endemique"},"modified":"2023-11-03T21:40:05","modified_gmt":"2023-11-03T21:40:05","slug":"la-miraculee-de-lile-maurice-retour-sur-le-difficile-sauvetage-dune-plante-endemique","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/comores\/toutes-les-actualites\/la-miraculee-de-lile-maurice-retour-sur-le-difficile-sauvetage-dune-plante-endemique","title":{"rendered":"La miracul\u00e9e de l\u2019\u00eele Maurice\u00a0: retour sur le difficile sauvetage d\u2019une plante end\u00e9mique"},"content":{"rendered":"

Africa-Press – Comores. <\/strong><\/span>C\u2019est une espe\u0300ce ressuscite\u0301e d\u2019entre les morts… En 1990, il ne restait plus a\u0300 Maurice que deux plants de Cylindrocline lorencei, un arbuste aux fleurs mauves ende\u0301mique de l\u2019i\u0302le. Le Conservatoire botanique national de Brest (CBNB) disposait cependant de quelques graines et<\/p>\n

boutures, rapporte\u0301es treize ans plus to\u0302t par un botaniste avise\u0301. Quelques plants furent alors cultive\u0301s et diffuse\u0301s aupre\u0300s d\u2019autres jardins botaniques. He\u0301las, en 1993, tous pe\u0301rirent, de me\u0302me que les deux derniers spe\u0301cimens de Maurice : l\u2019espe\u0300ce fut alors de\u0301clare\u0301e e\u0301teinte.<\/p>\n

Sauvetage d\u2019embryons<\/b><\/p>\n

Mais le conge\u0301lateur du CBNB abritait une poigne\u0301e de graines. \u201cNous avons d\u2019abord tente\u0301 de les faire germer\u201d, explique Ste\u0301phane Buord, directeur scientifique du Conservatoire. En vain. \u201cCes embryons ve\u0301ge\u0301taux contenaient pourtant des cellules encore vivantes. Nous avons donc seme\u0301 celles-ci dans un milieu nutritif. Cette culture in vitro a ge\u0301ne\u0301re\u0301 des plantules.\u201d Un sauvetage d\u2019embryons, une grande premie\u0300re dans le domaine de la conservation ! Les plants ont ensuite e\u0301te\u0301 cultive\u0301s en pleine terre… Mais les tentatives de bouturage e\u0301chouent.<\/p>\n

Biotechnologie ve\u0301ge\u0301tale<\/b><\/p>\n

En 2008, le CBNB recourt a\u0300 nouveau a\u0300 une biotechnologie ve\u0301ge\u0301tale : la micropropagation, c\u2019est-a\u0300-dire la culture in vitro des faibles bourgeons restants pour les multiplier… Des centaines de plants en re\u0301sultent ! Dernie\u0300re e\u0301tape : leur re\u0301introduction a\u0300 Maurice. Les essais se succe\u0300dent pendant plusieurs anne\u0301es. Sans re\u0301sultat.<\/p>\n

Mais, il y a cinq ans, des centaines d\u2019individus implante\u0301s sur le site de Pe\u0301trin, dans le Parc naturel des Gorges de la Rivie\u0300re Noire, s\u2019y sont e\u0301panouis. Aujourd\u2019hui, la plante s\u2019appre\u0302te a\u0300 fleurir. Le succe\u0300s de l\u2019ope\u0301ration sera complet lorsque les premiers rejetons apparai\u0302tront.<\/p>\n

Pour plus d’informations et d’analyses sur la Comores<\/a>, suivez Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – Comores. C\u2019est une espe\u0300ce ressuscite\u0301e d\u2019entre les morts… En 1990, il ne restait plus a\u0300 Maurice que deux plants de Cylindrocline lorencei, un arbuste aux fleurs mauves ende\u0301mique de l\u2019i\u0302le. Le Conservatoire botanique national de Brest (CBNB) disposait cependant de quelques graines et boutures, rapporte\u0301es treize ans plus to\u0302t par un botaniste avise\u0301. […]<\/p>\n","protected":false},"author":82,"featured_media":13470,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[36,53,45],"class_list":["post-13471","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-comores","tag-comores"],"yoast_head":"\nLa miracul\u00e9e de l\u2019\u00eele Maurice\u00a0: retour sur le difficile sauvetage d\u2019une plante end\u00e9mique - Comores<\/title>\n<meta name=\"description\" content=\"C\u2019est une espe\u0300ce ressuscite\u0301e d\u2019entre les morts... 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